velocity and spring question

[Madcat_MK2]

Hello, I was with some friends shooting one of my RT-ULE mags yesterday for first the time since replacing all the old orings it had on since the factory build years ago and while it did not have any leaking issues, the velocity was a little weird. Both my mags have always shot the silver spring but...

[adennis]

I purchased a 68 classic automag yesterday and I am having low velocity issue. With the velocity all the way up the gun shoots under 150 FPS. I shot some oil through it but have not tried anything else at this point. Any advice is appreciated.

Bit of extra info:
The low velocity...